US2703904A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air driven rotating brush for vacuum cleaners
Assignee: MARY E DE LONG
•
Filing: 1952-03-08
•
Granted: 1955-03-15
•
Expires: 1972-03-08
Abstract
No abstract record available.
Inventors
- 👤 Long Everett M De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:34
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/02; A47L9/04; A47L9/0405; A47L9/0416; A47L9/0461; A47L9/0483; Y; Y10; Y10S; Y10S415/00; Y10S415/904
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US987820A
Cited
US1036735A
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US1167996A
Cited
US1147064A
Cited
US2045980A
Cited
US2078634A
Cited
US2246036A
Cited
US2331692A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-03-14 | 1958-09-13 | 1959-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-03-14 | 1962-09-13 | 1963-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-03-14 | 1966-09-13 | 1967-03-15 | $7700.00 | Window Closed / Lapsed |